Discussion :: Operational Amplifiers - General Questions (Q.No.10)
|Uuumkl said: (Mar 3, 2011)|
|In inverting amp gain is-rf/ri if we decrease gain ri will increase.|
|Vatsala Sharma said: (May 23, 2011)|
|Gain of inverting amplifier is inversely proportional to input resistance. So, gain decreases when input resistance is increase.|
|Manoj S Awakhare said: (Jun 30, 2012)|
|Acctually the diagram is in inverting configuration. So it has gain equation Gain= -Rf/Rin. It means gain inversly proportional to Rin. Therefore answer is C.|
|Rashmi said: (Aug 12, 2012)|
|Gain of an inverting amplifier= -Rf/Ri, therefore the answer is "C".|
|Dushyanth said: (Jan 11, 2015)|
|Why can't removing the feedback resistor be an option. Since Gain = Rf/Ri.
And Rf = ohms if we remove the feedback resistor Rf = 0. So Rf is reduced so gain will also be reduced. But why is't that a correct option.
|Shahid said: (Feb 12, 2015)|
Removing feedback resistor will make Rf = Infinity whereas shorting it will make feedback resistor Rf=0.
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